ardo

hello everyone, I posted a thread about my 1980 SX400 that ran only on choke, one of the suggestions was that the jets are clogged or dirty gas and gas tank, well I took the carbs out open the float bowl pull out the idle jets and re clean them ( they were not clogged) I checked the petcock filter it is clean there is no rust in the gas tank, as for the idle going up and hanging some where I read that is running lean, I unplugged the caps of the mixture adjust screw and turn out three full turns, put everything back together except the air box, now the bike does not run I got spark, I got fuel coming to the carbs, yet would not run, any ideas?

Hi thank you for your response, I will check both again, I was so sure I cleaned good, but Ill take the apart again, where is a good parts place in case I need the boots

Hello everyone, this is my first time posting a question, I am a newbie, forgive me if I could not find what I am looking for in search forum, so here it goes I have a 1980 Yamaha sx400 was not running, (due to sitting for a long time) I pulled the carbs off of the bike went through all the jets, clean them well, and put back on the bike, it ran for a while, but the idle was never consistant, as I rev the trottle sometimes the idle goes up by itself, unpredictably, it has been sitting for few months, lately I started again it starts right away, but as soon as I push the choke in, dies, I also noticed the RPm needle goes up very slow, I am assuming the cable might be on its way out, the boots were not that bad. any suggestions will be highly appreciated. ardo